Manufacturing method for friction welded aluminum alloy parts

Details Manufacturing method for friction welded aluminum alloy parts Manufacturing method for friction welded aluminum alloy parts

2004-05-20

2009-02-17

Kerns, Kevin P (Department: 1793)

Metal fusion bonding

Process

Using dynamic frictional energy

C228S002100, C228S114000

Reexamination Certificate

active

07490752

ABSTRACT:
A method for manufacturing aluminium alloy parts with precipitation hardening including friction stir welding of at least two elements made from the same alloy or different alloys, solution heat treatment, and quenching of welded parts, in which the elements are subjected to heat treatment before welding at temperature T for at least 2t1, t1being defined as the minimum treatment duration at temperature T leading to a specific melting peak energy defined by AED equal to less than 1 J/g. A method according to the invention substantially avoids an increase in the grain size following solution heat treatment after welding. The invention further relates to novel aluminum materials as well as uses therefor.

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Hassan et al, “Stability of Nugget Zone Grain Structures in High-Strength Al-alloy Friction Stir Welds During Solution Treatment”, Acta Materialia vol. 51, 2003, pp. 1923-1936.

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